JPH03227265A - Optical print head - Google Patents
Optical print headInfo
- Publication number
- JPH03227265A JPH03227265A JP2023358A JP2335890A JPH03227265A JP H03227265 A JPH03227265 A JP H03227265A JP 2023358 A JP2023358 A JP 2023358A JP 2335890 A JP2335890 A JP 2335890A JP H03227265 A JPH03227265 A JP H03227265A
- Authority
- JP
- Japan
- Prior art keywords
- base
- lens array
- light emitting
- fixed
- vertical surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000003491 array Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は発光ダイオードアレイを用い、光学的に安定し
た光プリントヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an optically stable optical print head using a light emitting diode array.
（ロ）従来の技術
従来より印字ヘッドに対応した発光領域を有する光プリ
ントヘッドは特開昭５９−１５５８２７号公報に示され
るように短焦点レンズアレイ（以下レンズアレイという
）を利用して光プリンタ感光面に発光形状等を投影させ
ていた。(B) Conventional technology Conventionally, an optical print head having a light-emitting area corresponding to a print head has been used in an optical printer using a short focus lens array (hereinafter referred to as a lens array), as shown in Japanese Patent Application Laid-open No. 59-155827. A light emitting shape, etc. was projected onto a photosensitive surface.
ところが、このレンズアレイは被写界深度が浅く、光源
と感光面との距離（いわゆる物体像面間距離）は共役長
（Ｔｏｔａｌ Ｃｏｒｊｕｇａｔｅ Ｌｅｎｇｔｈ ：
ＴＣ）以内に正しく設定されていなければならず、そ
の許容値は極めて小さい。However, this lens array has a shallow depth of field, and the distance between the light source and the photosensitive surface (so-called distance between object and image planes) is limited to the conjugate length (Total Cojugate Length:
It must be set correctly within TC), and its tolerance is extremely small.
例えばこの位置合せは特開昭５９−１７０８１６号公報
や特開昭６２−２８２９５７号公報に示されている如く
、発光ダイオードアレイの発光領域を実際に点灯駆動さ
せ、その投影像をモニタしながら、まず投影像に欠けが
生じないように発光領域列（例えば全長２４０ｍｍ）と
レンズアレイの長芋方向中心軸とをレンズアレイ側面に
設けたＹ軸調整ビス等で調整（この時の許容量±０．
２ｍｍ）Ｌ、次いで投影像の照度と輪郭が中央と両端で
等しくなるようにレンズアレイ底面または両端縁に設け
た２軸調整ビス等で調整する（許容量±０．１ｍｍ）。For example, as shown in JP-A-59-170816 and JP-A-62-282957, this positioning is performed by actually driving the light emitting area of the light emitting diode array and monitoring its projected image. First, in order to avoid defects in the projected image, adjust the light emitting region array (for example, total length 240 mm) and the center axis of the lens array in the long direction using a Y-axis adjusting screw provided on the side of the lens array (tolerance at this time is ±0.
2mm)L, and then adjust the illumination and outline of the projected image to be equal at the center and at both ends using a biaxial adjustment screw or the like provided on the bottom surface of the lens array or at both ends (tolerance: ±0.1mm).
ついで調整の終わったレンズアレイの位置がずれないよ
うに、また調整手段に触れないようにレンズアレイの両
側面からこれを挾持し、固定する。Next, the adjusted lens array is held and fixed from both sides of the lens array so that it does not shift and does not touch the adjusting means.
（ハ）発明が解決しようとする課題
この様な位置の調整は、二軸１ｌｌＩＩ整の際の基準面
が定まらないので極めて煩雑であり、又軸調整中のレン
ズアレイの支持が不確実なため、軸調整後の部品固定で
光学要素の相対位置がずれることがあり不都合であった
。(c) Problems to be Solved by the Invention Such position adjustment is extremely complicated because the reference plane for two-axis alignment is not determined, and the support of the lens array during axis adjustment is uncertain. However, the relative positions of the optical elements may shift when the components are fixed after axis adjustment, which is inconvenient.
（ニ）課題を解決するための手段
本発明は上述の点を改めるためになされたもので、基準
面と基準面に垂直な面とを持つ略し字状の基台を用い、
発光ダイオードアレイの整列方向がその基台の垂直な面
に平行になるように発光ダイオードを有した長尺な基板
を基台の基準面に載置し、レンズアレイをその中心が発
光ダイオードアレイの上方に位置するように基台の垂直
な面に固定したもので、より好ましくは、基板の長手方
向の延長上に当る基台の上にはレンズアレイの高さ調整
手段を設けたものである。(d) Means for Solving the Problems The present invention has been made to correct the above-mentioned points, and uses an abbreviated base having a reference plane and a plane perpendicular to the reference plane.
Place a long substrate with light emitting diodes on the reference surface of the base so that the alignment direction of the light emitting diode array is parallel to the vertical plane of the base, and place the lens array so that the center of the light emitting diode array is parallel to the vertical plane of the base. The lens array is fixed to the vertical surface of the base so as to be located above, and more preferably, the height adjustment means for the lens array is provided on the base that extends in the longitudinal direction of the substrate. .
（ホ）作用
これによりレンズアレイの固定はＹ軸調整を兼ねること
ができるので、レンズアレイのＹ軸調整は必要でなく、
固定時の位置ずれもない。さらには２軸調整すらも基台
を基準にして行うことができる。(E) Effect This allows fixing the lens array to also serve as Y-axis adjustment, so Y-axis adjustment of the lens array is not necessary.
There is no position shift when fixed. Furthermore, even two-axis adjustment can be performed using the base as a reference.
（へ）実施例
第１図は本発明実施例の光プリントヘッドの要部斜視図
で、１は、基準面１１と基準面に垂直な面１２とを持つ
断面略し字状の基台で、例えば基準面ｌｌ側の厚み６ｍ
ｍ、垂直な面１２側の厚み３ｍｍ、長さ２８０ｍｍのア
ルミニウムなどからなり、より好ましくは内面は平坦化
処理され、基準面１１側には複数の取付は孔等が設けら
れている。(F) Embodiment FIG. 1 is a perspective view of the main parts of an optical print head according to an embodiment of the present invention. Reference numeral 1 denotes a base having an abbreviated cross-section having a reference plane 11 and a plane 12 perpendicular to the reference plane; For example, the thickness on the reference surface ll side is 6 m.
It is made of aluminum or the like with a thickness of 3 mm on the vertical surface 12 side and a length of 280 mm, and the inner surface is preferably flattened, and a plurality of mounting holes etc. are provided on the reference surface 11 side.
２は、整列された複数の発光領域を表面に持つ整列され
た複数の発光ダイオードアレイ２２を有して基台１の基
準面１１に載置された長尺の基板で、その発光ダイオー
ドアレイ２２の整列方向が基台１の垂直な面１２に平行
になるように熱伝導性がよく耐熱性に優れた例えばシリ
コン系の接着剤で固定されている。この基板２は例えば
輻７ｍｍ１長さ２３０ｍｍ、のセラミック、硝子エポキ
シなどを基材とする、好ましくは反りが少なくなるよう
に両面に輻の広いプリントパターンをもった基板からな
り、１インチ当り１２ドツトの割合で整列した発光領域
を持つ長さ約８ｍｍの発光ダイオードアレイ２２（詳し
くは例えば国内公表６１−８０２０４５号公報参照）を
２８個−列に整列固着し、好ましくはその駆動素子も同
じ面に固着してこれらに配線を施しである。さらにはフ
レキシブル基板とかフラットケーブル等の配線手段２３
で端子導出が成されている。Reference numeral 2 denotes a long substrate having a plurality of aligned light emitting diode arrays 22 having a plurality of aligned light emitting regions on its surface and placed on the reference surface 11 of the base 1; They are fixed with a silicon-based adhesive having good heat conductivity and excellent heat resistance, for example, so that the alignment direction of the base 1 is parallel to the perpendicular surface 12 of the base 1. This substrate 2 is made of ceramic, glass epoxy, etc., with a diameter of 7 mm and a length of 230 mm, and preferably has a printed pattern with a wide radius on both sides to reduce warping, and has a print pattern of 12 dots per inch. 28 light emitting diode arrays 22 (for details, see Japanese Publication No. 61-802045) each having a length of about 8 mm and having light emitting areas arranged at a ratio of These are fixed and wired. Furthermore, wiring means 23 such as flexible boards and flat cables
Terminal derivation is accomplished.
３は、発光ダイオードアレイ２２の発光領域の上方に位
置するように基台ｌの垂直な面１２に固定された短焦点
レンズアレイ（ロッドレンズアレイ：レンズアレイ）で
、例えばレンズ集合体を樹脂で固定したものである。3 is a short focus lens array (rod lens array: lens array) fixed to the vertical surface 12 of the base l so as to be located above the light emitting area of the light emitting diode array 22; for example, the lens assembly is made of resin. It is fixed.
４は、基台１の基準面１１とレンズアレイ３とに跨って
設けられたアルミニウムＬ字アングル等からなる覆いで
ある。Reference numeral 4 denotes a cover made of an aluminum L-shaped angle, etc., provided over the reference surface 11 of the base 1 and the lens array 3.
この様な構成において光学的な調整は、例えば第２図に
示すようにレンズアレイ３を基台１の垂直な面１２にビ
ス５１等で仮固定し、基台１の基準面１１に設けられた
ビス５２成るいは所定の高さのブロック体（図示せず）
などの高さ調整手段によりレンズアレイ３の２軸調整を
した後ビス５１により基台１の垂直な面１２にレンズア
レイ３を固定する。なお仮固定することなく組立てる方
法として例えば、レンズアレイ３をブロック体上を摺動
させて基台１の垂直な面に直接貼付してもよい。次いで
裏面に接着剤を塗布した基板２を発光領域の列がレンズ
アレイの中心にくるように位置決めし、ビスなどで固定
する。この位置合せ作業は基板２が長尺であればあるほ
ど容易である。In such a configuration, optical adjustment can be carried out by temporarily fixing the lens array 3 to the vertical surface 12 of the base 1 with screws 51, etc., as shown in FIG. screw 52 or a block body of a predetermined height (not shown)
After biaxially adjusting the lens array 3 using height adjusting means such as the above, the lens array 3 is fixed to the vertical surface 12 of the base 1 using screws 51. As a method of assembling without temporarily fixing, for example, the lens array 3 may be slid on a block body and attached directly to the vertical surface of the base 1. Next, the substrate 2, whose back surface is coated with adhesive, is positioned so that the row of light emitting regions is in the center of the lens array, and fixed with screws or the like. This alignment work becomes easier as the substrate 2 becomes longer.
そして光学特性を確認した後に接着剤を硬化させる。最
後に覆い４を固定すればよい。After checking the optical properties, the adhesive is cured. Finally, the cover 4 should be fixed.
この様な組立ては、基板２の裏面から発光ダイオードア
レイ２２の表面までの高さを一定にすることができるこ
とに着目したものである。そして組立ての順番を変更し
たり、組立てにおいて高さ調整手段に触れることなく且
つこれを配列の基準とするためには、基板２の長手方向
の延長上に当る基台１の上に短焦点レンズアレイの高さ
調整手段を設けれておけばよい。This kind of assembly focuses on the fact that the height from the back surface of the substrate 2 to the front surface of the light emitting diode array 22 can be made constant. Then, in order to change the order of assembly or to use the height adjustment means as a reference for arrangement without touching the height adjustment means during assembly, a short focal length lens is placed on the base 1 which is an extension of the substrate 2 in the longitudinal direction. It is only necessary to provide means for adjusting the height of the array.
（ト）発明の効果
本発明は上述の如き構成であるから、レンズアレイ３の
基台１の垂直な面１２への固定はそのまま基台１の基準
面１１を基準としたＹ軸調整を兼ねることとなるので、
レンズアレイのＹ軸調整は必要でなく、また覆い４は単
なる防塵と外部からの衝撃に対する保護の目的であって
レンズアレイ３に圧力を加えるものではないので、固定
時の位置ずれもない。さらにはＺ軸調整すらも基台を基
準にして行うことができるから、組立ては煩雑でなく、
しかも光プリンターにおいての取扱いも基台１を支えれ
ばレンズアレイもその光学条件に影響を与えることなく
共に取扱うこととなるので、光プリントヘッド自体の取
扱も容易となる。(G) Effects of the Invention Since the present invention has the above-described configuration, fixing the lens array 3 to the vertical surface 12 of the base 1 also serves as Y-axis adjustment with reference to the reference plane 11 of the base 1. Because of this,
There is no need for Y-axis adjustment of the lens array, and since the cover 4 is merely for the purpose of dustproofing and protection against external impact and does not apply pressure to the lens array 3, there is no positional shift when it is fixed. Furthermore, even the Z-axis adjustment can be done based on the base, so assembly is not complicated.
Furthermore, when handling the optical printer, if the base 1 is supported, the lens array can also be handled without affecting its optical conditions, making it easier to handle the optical print head itself.
第１図は本発明実施例の光プリントへ・ｌドの要部斜視
図、第２図はその光学調整を説明する側面図である。
１・・・・基台、１１・・・・基準面、１２・・・・（
基台１の）垂直な面、２・・・・基板、２２・・・・発
光ダイオードアレイ、３・・・・短焦点レンズアレイ（
レンズアレイ）、４・・・・覆い。FIG. 1 is a perspective view of the main parts of an optical print head/driver according to an embodiment of the present invention, and FIG. 2 is a side view illustrating its optical adjustment. 1...Base, 11...Reference surface, 12...(
2... substrate, 22... light emitting diode array, 3... short focus lens array (
lens array), 4... Cover.
Claims (2)
台と、整列された複数の発光ダイオードアレイを有しそ
の発光ダイオードアレイの整列方向が基台の垂直な面に
平行になるように前記基台の基準面に載置された長尺の
基板と、前記発光ダイオードアレイの上方に位置するよ
うに前記基台の垂直な面に固定された短焦点レンズアレ
イと、基台とレンズアレイとに跨って設けられた覆いと
を具備したことを特徴とする光プリントヘッド。(1) A substantially L-shaped base with a reference plane and a plane perpendicular to the reference plane, and a plurality of aligned light emitting diode arrays, with the alignment direction of the light emitting diode arrays being perpendicular to the base. a long substrate placed on a reference surface of the base so as to be parallel to each other, and a short focus lens array fixed to a vertical surface of the base so as to be positioned above the light emitting diode array; An optical print head characterized by comprising a cover provided over a base and a lens array.
には前記短焦点レンズアレイの高さ調整手段が設けれて
いることを特徴とする特許請求の範囲第１項記載の光プ
リントヘッド。(2) The light according to claim 1, characterized in that a height adjusting means for the short focal length lens array is provided on the base, which corresponds to the longitudinal extension of the substrate. print head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023358A JPH03227265A (en) | 1990-02-01 | 1990-02-01 | Optical print head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023358A JPH03227265A (en) | 1990-02-01 | 1990-02-01 | Optical print head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03227265A true JPH03227265A (en) | 1991-10-08 |
Family
ID=12108352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023358A Pending JPH03227265A (en) | 1990-02-01 | 1990-02-01 | Optical print head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03227265A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03250194A (en) * | 1990-02-27 | 1991-11-07 | Taisei Corp | Method of construction for shaft and shaft excavator |
| JPH047145U (en) * | 1990-05-07 | 1992-01-22 | ||
| WO2002092349A1 (en) * | 2001-05-16 | 2002-11-21 | Suzuka Fuji Xerox Co., Ltd. | Led print head and production method of led print head and method of producing led substrate and method of pasting led substrate |
| EP2538681A3 (en) * | 2011-06-24 | 2017-07-19 | Casio Computer Co., Ltd. | Light source device and projector |
-
1990
- 1990-02-01 JP JP2023358A patent/JPH03227265A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03250194A (en) * | 1990-02-27 | 1991-11-07 | Taisei Corp | Method of construction for shaft and shaft excavator |
| JPH047145U (en) * | 1990-05-07 | 1992-01-22 | ||
| WO2002092349A1 (en) * | 2001-05-16 | 2002-11-21 | Suzuka Fuji Xerox Co., Ltd. | Led print head and production method of led print head and method of producing led substrate and method of pasting led substrate |
| CN1296213C (en) * | 2001-05-16 | 2007-01-24 | 铃鹿富士施乐株式会社 | LED print-head and producing method thereof, and methof for producing LED substrate and pasting method thereof |
| EP2538681A3 (en) * | 2011-06-24 | 2017-07-19 | Casio Computer Co., Ltd. | Light source device and projector |
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